Perhaps you should try some spelling variations:
thing teaching » china teaching, third teaching, using teaching
teaching doing » teaching china
first thing » first things, first hint, first third
doing von » doing un, ing von
lang yan » wang yan, wang yang, zhang yan
yang jui » yang judy, yang xi
yang yi » yang xi

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: lang yan ((yang yi) OR (((yang di) OR (yang jui)))) first thing teaching doing von ;~.
• Adding a wildcard symbol may retrieve word variants: lang yan ((yang yi) or (((yang di) or (yang jui)))) first thing teaching doing von ;*.